Porthole cover for swimming-pool wall



FIG. 1 is a front elevational view of a porthole cover for aswimming-pool wall showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is the opposite side elevational view thereof;

FIG. 4 is a rear elevational view thereof; and

FIG. 5 is a perspective view thereof.

The ornamental design for a porthole cover for swimming-pool wall, asshown and described.